Search in Custom ListView On Button Click Example

SEARCH IN CUSTOM LISTVIEW ON BUTTON CLICK

SOURCE CODE [main.xml] is

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
                android:orientation="vertical"

android:layout_width="fill_parent"

                android:layout_height="fill_parent">

                <Button android:text="Search"

android:id="@+id/Button01"

                                android:layout_alignParentTop="true"

android:layout_alignParentRight="true"

                                android:layout_width="wrap_content"

android:layout_height="wrap_content">

</Button>

                <EditText android:layout_width="fill_parent"
                                android:layout_height="wrap_content"

android:text="" android:id="@+id/EditText01"

                                android:layout_toLeftOf="@+id/Button01">

</EditText>

                <ListView android:layout_height="wrap_content"
                                android:layout_below="@+id/EditText01"

android:layout_width="wrap_content"

                                android:id="@+id/ListView01">

</ListView>

                                
</RelativeLayout>

Android - Search in Custom ListView Example

SEARCH IN CUSTOM LISTVIEW

SOURCE CODE [main.xml] is

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

android:orientation="vertical"

android:layout_width="fill_parent"

                android:layout_height="fill_parent">

                <EditText android:id="@+id/EditText01"

android:layout_height="wrap_content"

                                android:layout_width="fill_parent"

android:hint="Search">                               

                </EditText>

                <ListView android:id="@+id/ListView01"

android:layout_height="wrap_content"

                                android:layout_width="fill_parent">

</ListView>

</LinearLayout>

Android Emulator Keyboard Shortcuts

EMULATOR KEYBOARD SHORTCUTS

Emulator Device Key	Keyboard Key
Home	HOME
Menu (left softkey)	F2 or Page-up button
Star (right softkey)	Shift-F2 or Page Down
Back	ESC
Call/dial button	F3
Hangup/end call button	F4
Search	F5
Power button	F7
Audio volume up button	KEYPAD_PLUS, Ctrl-5
Audio volume down button	KEYPAD_MINUS, Ctrl-F6
Camera button	Ctrl-KEYPAD_5, Ctrl-F3
Switch to previous layout orientation	KEYPAD_7, Ctrl-F11
Switch to next layout orientation	KEYPAD_9, Ctrl-F12
Toggle cell networking on/off	F8
Toggle code profiling	F9 (only with -trace startup option)
Toggle fullscreen mode	Alt-Enter
Toggle trackball mode	F6
Enter trackball mode temporarily	Delete
DPad left/up/right/down	KEYPAD_4/8/6/2
DPad center click	KEYPAD_5
Onion alpha increase/decrease	KEYPAD_MULTIPLY(*) / KEYPAD_DIVIDE(/)

Android - Hide Title Bar & Status Bar through AndroidManifest.xml

HIDE THE TITLE BAR AND STATUS BAR (FULLSCREEN)

<activity android:name=".YourClassName"

android:theme="@android:style/Theme.NoTitleBar.Fullscreen">

</activity>

Android - Function to convert ImageURL to Bitmap object

IMAGE URL TO BITMAP

Use this function “convertURLtoBitmap”

public Bitmap convertURLtoBitmap(String src) {

                try {

                                URL url = new URL(src);
                                                
                                HttpURLConnection connection = (HttpURLConnection) url
                                                .openConnection();

                                connection.setDoInput(true);
                                connection.connect();

                                InputStream input = connection.getInputStream();
                                Bitmap myBitmap = BitmapFactory.decodeStream(input);

                                return myBitmap;

                }

                catch (IOException e) {

                                e.printStackTrace();
                                return null;

                }
}

Email Validation Function

public boolean validateEmail(String email) {

Pattern pattern;

Matcher matcher;

String EMAIL_PATTERN = "^[_A-Za-z0-9-]+(\\.[_A-Za-z0-9-]+)*@[A-Za-z0-9]+(\\.[A-Za-z0-9]+)*(\\.[A-Za-z]{2,})$";

pattern = Pattern.compile(EMAIL_PATTERN);

matcher = pattern.matcher(email);

return matcher.matches();

}

Searching the elements of a String array, starts with SEARCHTEXT (String)

Searching the elements of a String array, starts with SEARCHTEXT (String)

public static ArrayList<String> searchFromStart(String[] inputArray, String searchText) {

            ArrayList<String> outputArray = new ArrayList<String>();

            for (int i = 0; i < inputArray.length; i++) {

                        if (searchText.compareToIgnoreCase(inputArray[i].substring(0,

                                                searchText.length())) == 0) {

                                    outputArray.add(inputArray[i]);

                        }

            }

            return outputArray;

}

Android Simple GridView Example

SIMPLE GRIDVIEW

SOURCE CODE [main.xml] is

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
                android:orientation="vertical"

android:layout_width="fill_parent"

                android:layout_height="fill_parent">

                <TextView android:layout_width="fill_parent"
                                android:layout_height="wrap_content"

android:text="@string/hello" />

                <GridView android:id="@+id/gridview"

android:layout_width="fill_parent"

                                android:layout_height="fill_parent"

android:numColumns="auto_fit"

                                android:verticalSpacing="10dp"

android:horizontalSpacing="10dp"

                                android:columnWidth="90dp"

android:stretchMode="columnWidth"

                                android:gravity="center" />

</LinearLayout>

Android CheckBox Example

CHECKBOX


Android checkbox is used to select more than one option at a time.
Example:  In an admission form we may need to select both diploma & BE in Graduate option.
For this we can use checkbox which will enable us to select multiple options.



SOURCE CODE [main.xml] is

<xml version="1.0" encoding="utf-8"?> 
<LinearLayout android:id="@+id/LinearLayout01"
                android:layout_width="fill_parent"

android:layout_height="fill_parent"

                xmlns:android="http://schemas.android.com/apk/res/android"
                android:orientation="vertical">
                <CheckBox android:id="@+id/check1" 

android:layout_width="100px"

                                android:layout_height="wrap_content"

android:text="Android" />

Android - Custom ListView Example

CUSTOM LISTVIEW

SOURCE CODE [main.xml] is

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

android:orientation="vertical"

android:layout_width="fill_parent"

                android:layout_height="fill_parent">

                <ListView android:id="@+id/ListView01"

android:layout_height="wrap_content"

                                android:layout_width="fill_parent">

</ListView>

</LinearLayout>

Show a context menu for long-clicks in an Android ListView

AN ACTIVITY WITH AN EXPANDING LISTVIEW

Creating a Simple ListView

If you have an activity that will only contain a single ListView control, you can derive your activity from the ListActivity instead of Activity. However, I think I might like to show some extra info below my ListView so I chose to have a separate ListView object. My activity layout (main.xml) looks like this:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
                android:layout_width="fill_parent"
                android:layout_height="fill_parent"
                android:orientation="vertical">
                <ListView android:id="@+id/ listview "
                                 android:layout_width="fill_parent"
                                android:layout_height="wrap_content"
                                android:layout_weight="1" />
</LinearLayout>

Android ListView OnClick Example

LISTVIEW ONCLICK
 

SOURCE CODE [main.xml] is 

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout android:id="@+id/LinearLayout01"

                android:layout_width="fill_parent"

android:layout_height="fill_parent"

                xmlns:android="http://schemas.android.com/apk/res/android">

                <ListView android:id="@+id/listview"

android:layout_width="wrap_content"

                                android:layout_height="wrap_content" />

</LinearLayout>

Android Search in ListView Example

SEARCH IN LISTVIEW


SOURCE CODE [main.xml] is


<?xml version="1.0" encoding="utf-8"?>
<LinearLayout android:id="@+id/LinearLayout01"
                android:layout_width="fill_parent"

android:layout_height="fill_parent"

                xmlns:android="http://schemas.android.com/apk/res/android"
                android:orientation="vertical">

<EditText android:id="@+id/EditText01"

android:layout_height="wrap_content"

android:layout_width="fill_parent"

android:hint="Search">

</EditText>

<ListView android:id="@+id/ListView01"

android:layout_width="wrap_content"

android:layout_height="wrap_content" >

</ListView>

</LinearLayout>

Android Simple ListView Example

SIMPLE LISTVIEW
 
SOURCE CODE [main.xml] is 


<?xml version="1.0" encoding="utf-8"?>
<LinearLayout android:id="@+id/LinearLayout01"
                android:layout_width="fill_parent"

android:layout_height="fill_parent"

                xmlns:android="http://schemas.android.com/apk/res/android">
                <ListView android:id="@+id/listview"

android:layout_width="wrap_content"

                                android:layout_height="wrap_content" />
</LinearLayout>

Android - Structure of the Manifest.xml File

 STRUCTURE OF THE MANIFEST.XML FILE 

<?xml version="1.0" encoding="utf-8"?>

<manifest>

<uses-permission />

<permission />

<permission-tree />

<permission-group />

<instrumentation />

<uses-sdk />

<uses-configuration />

<uses-feature />

<supports-screens />

<compatible-screens />

<supports-gl-texture />